Bell-ringer.



E. WILSON. BELL 31mm. APPLICATION I'ILEIJ APR. 22, 1911.

Patented Mar. 26, 1912.-

3 SHEETS-SHEET 1.

COLUMBIA PLANOflRAPl-l 60., WAsulN E. WILSON.

BELL BINGER. APPLICATION 311.1111 APR. 22', 1911.

Patented 1111261912.

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BELL RINGER.

APPLICATION FILED Ammz, 1911.

Patented Mar. 26, 1912.

3 SHEBTS-SHEET 3.

UNITED STATES PATENT OFFICE.

EDWARD WILSON, OF ST. LOUIS, MISSOURI, ASSIGNOR 'IO ADREON MANUFACTURINGCOMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

BELL-RINGER.

Specification of Letters Patent.

Patented Mar. 26, 1912.

Application filed April 22, 1911. Serial No. 622,725.

To all whom it may concern Be it known that I, EDWARD WILSON, a

fluid under pressure so as to actuate the bell with which the device isused.

One object of my invention is to provide a bell ringer that comprisesonly a few part-s and which is so designed that the operating mediumexhausts freely on the down stroke of the piston, and another object isto provide an inexpensive bell ringer of simple construction that iseconomical in the con sumption of themedium used to operate the and thecylinder O is provided on its inner cylinder.

Other objects and desirable features of my invention will be hereinafterpointed tional view of the parts shown in Fig. 1;

Figs. 3 and 4 are detail views illustrating different adjustments of thedevice on the bell shaft that cotiperates with the operating cylinder ofthe ringer; Fig. 5- is a side elevational view showing a bracket ofslightly different construction from the one illustrated in Fig. 2 forsupporting the bell ringer; Fig. 6 is an enlarged vertical sectionalview of my improved bell ringer; Fig. 7 is a similar view showing thecylinder at the end. of its power stroke or up stroke; Fig. 8 is ahorizontal sectional view taken on the line 88 of Fig. 6 looking in thedirection indicated by the arrow; Figs. 9 and 10 are vertical sectionalviews of a slight modification of my invention; and Fig. 11 is ahorizontal sectional view taken on the line 11-11 of Fig. 9.

Referring to the drawings which illustrate the preferred form of myinvention,

A designates a bell mounted in a yoke 1 that is provided with ahorizontally disposed shaft 2 which is journaled in a supporting frame3. The bell ringer is arranged under the bell shaft 2 and consists of astationary piston B mounted on a bracket 1 connected to the frame 3, anda cylinder C reciprocatingly mounted on said piston and provided with aclosed dome-shaped upper end or top 5 which cooperates with a roller 6mounted in an arm 7 that is connected to the bell shaft 2. The piston Bis hollow and comprises a pressure chamber 8 which communicates. with asupply pipe 9 and an expansion chamber 10 arranged above the pressurechamber and having its upper end open, said chambers being separatedfrom each other by means of a partition wall 11 which is preferablyformed integral with the piston. The pressure chamber 8 is providedacent its upper end with an outlet port 12, the expansion chamber isprovided adjacent its lower end with an inlet port 13 side with anannular'duct 14 which alines with said outlet and inlet ports when thecylinder is at the end of its downward stroke, as shown in Fig. 6. Apacking ring 15 is arranged in an annular groove formed in the exteriorof the piston B below the inlet port 12 that leads from the pressurechamber, and a packing ring 16 is arranged adjacent the upper end of thepiston in a relatively wide annular groove or recess 17 formed in theexterior of the piston, said ring 16 also acting as a slide valve orclosure for an exhaust port 18 that is formed in the side of thecylinder adjacent the upper end of same. Both of said rings preferablyconsist of split metallic expansion rings which snugly engage the innersurface of the cylinder C, and the groove or recess 17, which receivesthe ring 16 at the upper end of the piston, is so proportioned that saidring can move relatively to the cylinder on the power stroke or upwardstroke of the cylinder and thus uncover the exhaust port 18 which saidring normally closes.

The means shown in Figs. 6 and 7 for moving the valve ring 16 so as to,uncover and cover the exhaust port 18 consists of the top and bottomshoulders or edges 17 and 17 respectively, of the groove 17 in whichsaid ring is arranged, but I do not wish it to be understood that myinvention is limited to the exact construction herein shown for othermeans might be used for controlling the exhaust of the operating mediumwithout departing from the spirit of my invention.

The operating medium, which may be any suitable fluid under pressure, issupplied to the pressure chamber 8 by means of the supply pipe 9 andescapes from said chamber through the port 12 and thence through theannular duct 14c and inlet port 13 into the expansion chamber 10,thereby causing the cylinder C to move upwardly and rock the shaft 2 towhich the bell is connected. As soon as the cylinder C starts to moveupwardly the supply of pressure to the expansion chamber 10 is cut offbecause a very slight upward movement of the cylinder carries theannular duct 14 on the interior of same out of alinement with the outletport 12 of the pressure chamber and the inlet port 13 of the expansionchamber. Consequently a bell ringer of this construction is economicalin the consumption of the medium used to operate same for only a verysmall quantity of the operating medium is admitted to the expansionchamber at each cycle of operations and the upward movement of thecylinder is effected by the expansion of said medium after it enters theexpansion chamber. The resiliency of the valve ring 16 causes it toremain in snug engagement with. the inner side of the cylinder C overthe port 18, when said cylinder starts to move upwardly but when saidring strikes the shoulder 17 the ring will stop or remain at rest, whilethe cylinder continues to move upwardly, thereby causing the exhaustport 18 to be uncovered by the time the cylinder reaches the end of itsupward stroke, as shown in Fig. 7. The operating medium escapes from theexpansion chamber 10 through the exhaust port 18 and the cylinder C thenstarts to move downwardly owing to the fact that there is nothing tosustain it in its raised position, the valve ring 16 being movedautomatically into its operative position over the exhaust port 18 whenthe lower edge of said ring strikes the shoulder 17 on the piston. Whenthe cylinder reaches the end of its downward stroke, as shown in Fig. 6,another charge is admitted to the expansion chamber and the cycle ofoperations above described is repeated, thereby causing the cylinder toreciprocate upwardly and down wardly and thus automatically rock thebell shaft 2 so long as pressure is maintained in the pressure chamber8.

A bell ringer of the construction above described can be manufacturedcheaply and is not liable to get out of repair because it comprises onlythree parts, namely, the stationary piston, the cylinder whichreciprocates on same, and the combined slide valve and packing ring 16which is moved automatically into and out of operative position withrelation to the exhaust port 18, by the upward and downward movement ofthe cylinder. The fact that the operating medium exhausts freely on thedownward stroke of the cylinder and is not withheld for compression is avery desirable feature of my bell ringer because it eliminates strainson the cooperating parts of the device; and still another desirablefeature is that the period of intake of the operating medium is veryshort and the full expanding force of said medium is utilized on theupward stroke of the cylinder.

The partition wall 11 in the piston B is preferably inclined, as shownin Figs. 6 and 7, so as to enable the ports 12 and 13 to be formed inthe same horizontal plane and the duct let tobe formed straight insteadof spirally, but it will, of course, be understood that the same resultscould be accomplished in various other ways without departing from thespirit of my invention. Furthermore, instead of mounting the device on abracket 4 that is connected to lug 3 on the frame 3, a bracket 4 of thekind shown in Fig. 5 could be connected directly to said frame by aU-bolt 4? or other suitable device.

The roller 6 and arm 7 on the bell shaft 2 are so constructed that thebell-ringing device can be adjusted properly with relation to saidroller without changing the position of the bracket on which thebell-ringing device is mounted. As shown in Figs. 1, 2, 3 and 4:, thearm 7 is bifurcated to receive the roller 6, thus forming a pair of jawswhich project" laterally from a hub 20 that is detachably connected tothe bell shaft 2 by means of a fastening device 21, said hub having aportion that projects laterally beyond one of said jaws. The roller 6 ismounted on a pin 22 that passes transversely through said jaws, and saidroller is provided with an integral collar or sleeve 23 that projectslaterally from one side of the roller, thereby causing the roller to liecloser to one of said jaws than to the other. If the roller does notaline properly with the dome 5 of the cylinder C, the roller 6 can beremoved and transposed, as shown in Fig. 3, so as to carry the rollerfarther away from the end of the shaft 2, and if it is necessary to movethe roller inwardly still farther from the end of the shaft 2, the arm 7is removed and transposed, as shown in Fig. 4, so as to carry both jawsof the arm away from the end of the shaft 2. In this way I am able toadjust the bell ringing device accurately relatively to the bell shaftwithout changing the posit-ion of the bracket on which the device ismounted.

In Figs. 9 to 11, inclusive, I have illustrated a slight modification ofmy invention wherein the valve that cooperates with the exhaust port 18in the cylinder C consists of a sleeve 30 slidingly mounted in the upperportion of said cylinder above the upper end of the piston B andprovided in its outer surface with a groove which receives a splitspring packing .ring 16 that holds the valve in position with relationto the cylinder and causes it to move with the cylinder. The partitionwall 11 in the stationary piston B is provided with an upwardlyprojecting stem 31 having a head 32 which cooperates with arms or aninwardly projecting flange 33 on the valve 30 to limit the upwardmovement of said valve, the space between said stem and the inner edgeof said flange being large so as tonot interfere with the expansion ofthe fluid in the expansion chamber. WVhen the cylinder C moves upwardlyfrom the position shown in Fig. 9 the head 32 on the stem 31 arrests theup ward movement of the valve 30 when the flange on said valve strikesthe under side of said head, thereby moving the valve rela tively to thecylinder C and thus causing the exhaust port 18 to be uncovered. Whenthe cylinder moves downwardly the valve 30 will move downwardly with ituntil the valve strikes the upper end of the piston B, the furtherdownward movement of the cylinder causing the valve to be moved over theexhaust port 18 so as to close said port.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In a bell-ringing device, a piston provided in its upper end with anexpansion chamber which is open at one end, a cylinder reciprocatinglymounted on said piston and having a closed end which forms the other endwall of said expansion chamber, means for intermittently admitting smallcharges of fluid under pressure to said expansion chamber, which fluidexpands and thus moves said cylinder in one direction, and means forpermitting said fluid to exhaust or escape freely from said chamber whenthe cylinder approaches the end of its stroke and when it moves in theopposite direction nearly to the end of its stroke.

2. In a bell-ringing device, a hollow piston provided intermediate itsends with a partition or cross web that divides the interior of sameinto a pressure chamber and an expansion chamber, the expansion chamberbeing open at one end, a cylinder reciprocatingly mounted on said pistonand forming a closure for the open end of said expansion chamber,cooperating means on said cylinder and piston for permitting smallcharges of fluid to pass from said pressure chamber into said expansionchamber wherein said fluid expands and thus moves said cylinderupwardly, and a port which permits the fluid to exhaust from said expansion chamber when said cylinder reaches the end of its upward strokeand continues to exhaust until said cylinder reaches nearly the limit ofits downward stroke.

3. In a hell-ringing device, a hollow piston provided intermediate itsends with a cross Web or partition that divides the interior of sameinto a lower chamber and an upper chamber, said upper chamber being openat its upper end, a cylinder reciprocatingly mounted on said piston andhaving a dome-shaped upper end of greater internal diameter than theexternal diameter of the piston, means for supplying fluid underpressure to the lower chamber of said piston, means for permitting asmall charge of said fluid to enter the upper chamber of the piston inwhich it expands and thus moves the cylinder upwardly, an exhaust upwardstroke and while it is moving downwardly, a valve cooperating with saidexhaust port, and means for actuating said valve so as to open and closesaid exhaust port.

4:. In a bell-ringing device, a hollow piston provided intermediate itsends with an inclined web or partition that divides the interior of saidpiston into a pressure chamher and an expansion chamber, a cylinderreciprocatingly mounted on the upper end of said piston and forming theend wall of said expansion chamber, an annular groove on the interior ofsaid cylinder, and an out let port and an admission port for saidpressure and expansion chambers, respectively, located in thesamehorizontal plane and adapted to cooperate with the annular groove onthe interior of said cylinder.

5. In a bell-ringing device, a hollow pis' ton provided intermediate itsends with a cross web or partition that divides the interior of sameinto a pressure chamber and an expansion chamber, a cylinderreciprocatingly mounted on said piston and having a dome-shaped 'topwhich forms one wall of said expansion chamber and into which the upperend of the piston extends when the cylinder is at the end of itsdownward stroke, means for permitting a small charge of fluid underpressure to pass from the pressure chamber into the expansion chamher inWhich it expands and thus moves the cylinder upwardly, an exhaust portin said cylinder arranged adjacent the upper end of same forestablishing direct communication between said expansion chamber and vthe valve and thus move it into and out of operative position When saidcylinder reoiprocates.

In testimony whereof I hereunto affix my signature in the presence oftWo Witnesses, this eighteenth day of April 1911.

EDXVARD WILSON.

\Vitnesses 2 \VELLs L. CHURCH, GEORGE BAKEWELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

